Leather-staking machine.



P.. BQHVAGEK. LEATHER STAKING MACHINE. AP?LIOATIO`N FILED HAY 1, 1913.

1 ,074,348., Patelited Sept. 30, v1913.

fw( Mad/f 9 9%@ A staking operation,

useful Improvements in Leather- STATES PATENT onnion.

PAUL B'oHACEK, or FnANKronT-oN-THE-MAIN, GERMANY, AssIGNon To 'MASCHINEN- FABRIK MoENUs A.G., or FRANKFonT-oN-THE-MAIN, GERMANY, A CORPORATION.

LEATELSTAKI'NG MACHINE.

' .Specication of LetterslPatent. Patented Sept-, 30, 1913l Application led May 1, 1913. Serial N o. 764,924.

T0 all whom t may concern.'

Beit known that I, PAUL BoHAcEK, a subject of the Emperor of Austria-Hungary, residing at 63 Moltke Allee, Frankfort-onthe-Main, in the Kingdom vof Prussia and Empire of Germany, have invented new and Staking Machines, of which the following is a specification.

This invention relates to leather staking machines having tools adapted to move to and fro and to coperate lsimilarly to pincers, use being made of clamping rolls arranged for traveling to and fro so as to hold the leather lying freely upon a stationary apron.

With a view to renderin the leather staking device suitable not on y for the sim le but also lfor boarding leather, the invention comprises two pairs of clamping rolls situated vone in front and one at the rear of the staking blade for holding the leather, all therolls or only some of them being actuated in such a manner that during the traveling movement of the rolls justas much material. is conducted behind the staking blade as there is material c0nducted away from the rolls situated in front of the staking blade. By this means there will be no tension in the leather, which is bent on its passage over the blade. The

requisites for a favorable staking action are therefore fulfilled by this arrangement, in-

the leather receiv'es in the main tens1on, thus insuring the staking of even the most tender leathers. .A

In the accom t anying drawing a preferred constructional l orm of the machine comprising the improved leather holding device is Irepresented in diagram, the tool consisting of a simple blade.

The leather or work 1 rests freely upon. the apron 2 fixed to the transverse beam and to the tension roll 3. In front and at the rear of the blade 9 which constitutes the tool are arranged pairs of clamping rolls 13,

14and 131, 14:. The rolls13,.131 under- -neath the leather areV for instance rotated bv the apron 2 inthe-direction indicated by afrows, inasmuch f as the slides 10 carrying Vgether,

blade 9 attached to the lower staking arm 7 carries out the traveling movement. Above the leather or Work are the clamping rolls 14, 141 which are likewise caused to travel, being iixed to the upper staking'arm 6. These rolls are supported in swinglng levers 15, which are drawn toward each other by a coil spring 15a connecting them, and guide rolls 16 journaled on the levers 15, contact with the cam disk 17 with the object of enabling both rolls 14, 141 to be displaced away from and toward the stakin blade 9 rand the boarding action to be varled. For

this purpose the cam disk 17 may be turned 1n any desired manner by means ofV a rod 18 either forward or backward. This allows the' boarding action to be modified and therefore an individual treatment of different parts of the leather and kinds of leather to lbe effected.

' Of course the invention may be carried out in various ways apart from the constructional form represented in the drawing. Thus for instance it is altogether immaterial whether the blade 9 remains in its highest vposition between the rolls 14, 141

ring the whole operation, or whether it is .used for the formation of the fold of the leather at the beginning of the Working stroke and subsequently drawn back again.

Moreover, either the upper or the lower clamping rolls, or

may be driven. As actuating means use may be made of toothed or frictional gear wheels, or the like, besides the apron 2.

Furthermore, an arrangement may be emstaking blade is fixed Vfrom between said carrying rollers, hinged levers above said apron, clamping rollers on said levers and means to reciprocate said clamping rollers toward and away from Y each other. these rolls in conjunction with the staking 2. In a leather staking machine an apron all the clamping rolls towith the upper rolls to the upper` levers adapted to engage said cam and a rod to adjust said cam, as specied.

In vtestimony whereof I afHX my signature in the presence of two witnesses.

PAUL BOHACEK.

fixed at one end to a cross beam, carrying rollers beneath said apron, a tension roller to which the other end of said apron is secured, a staking blade extending upwardly from between sald carrying rollers, hinged levers above said apron, clamping rollers on said levers, a cam between the middle portions of. said levers, guide rollers on said Witnesses:

JEAN GRUND, CARL GRUND. 

